Safety relays
Speed Monitor

Optimal safety protection in maintenance mode

Your Benefits

  • Easy commissioning – using only a screwdriver – reduces installation time
  • Tool backup using the Flexi Soft Designer and the Flexi Classic Configurator
  • Additional HTL encoder evaluation
  • Cascading of units is possible


Optimal safety protection in maintenance mode

The Speed Monitor is a zero-speed drive monitor that protects against dangerous movements by safely monitoring speed. It has different safety drive functions, such as SLS (safety limited speed) and SSM (safe speed monitor). In addition, the MOC3SA offers different operating modes: one mode with two independent proximity sensors, or a mixed mode with oneproximity and one signal output. The Speed Monitor is connectable to all SICK safety controllers.

At a glance
  • Zero-speed and drive monitoring
  • 4 safe semiconductor outputs
  • PL e (EN ISO 13849), SIL3 (IEC 61508), SILCL3 (EN 62061)
  • Maximum input frequency of 2 kHz
  • Adjustable monitoring limit/monitoring frequency from 0.1 to 9.9 Hz or 0.5 to 99 Hz
  • 2 application diagnostic outputs for failure and status display
  • Diagnostic LEDs


Technical overview

  • Technical data overview

    Technical data overview

    ApplicationsMotion Control
    Safety integrity level

    SIL3 (IEC 61508)

    SILCL3 (EN 62061)

    CategoryCategory 4 (EN ISO 13849)
    Performance levelPL e (EN ISO 13849)
    Configuration methodVia rotary switch
    Drive safety functions


    Safely-limited speed (SLS)

    Safe speed monitoring (SSM)

    Encoder interface


    A/B incremental encoder, HTL 12 V or 24 V

    Housing width22.5 mm
All technical data can be found accompanying the individual product